Sealing mechanism for ventilation

Abstract

The utility model discloses a sealing mechanism for ventilation, which comprises a mounting frame assembly, a door plate group, a filter screen and a protective cover, wherein the mounting frame assembly is formed by fixedly connecting a top beam, a left side beam, a bottom beam and a right side beam end to end in sequence, and a pneumatic control device is arranged on the left side beam; the door plate set comprises a plurality of bearing seats installed on the side wall of the left side beam and the side wall of the right side beam respectively, supporting shafts are rotationally installed between the bearing seats, and shutters are installed on the supporting shafts. The left side beam and the right side beam are arranged on the left side beam, the right side beam is arranged on the right side beam, the filter screen is arranged on the left side beam and the right side beam, the protective cover is arranged on the outer wall of the right side beam, and a transmission plate set is arranged on the supporting shafts and located between the right side beam and the protective cover. And the sealing mechanism is small in occupied space and size, and does not occupy space except for the device when being opened and closed.

Description

Technical Field

[0001] This utility model relates to the field of ventilation system technology, specifically to a sealed mechanism for ventilation. Background Technology

[0002] Ventilation ducts in ventilation systems are typically open, providing ample space for airflow during use. However, when not in use, debris often enters the ducts, affecting the ventilation equipment. To address this, metal mesh is usually installed at the duct openings to prevent debris from entering. However, in practice, if the mesh is too small, it affects ventilation; if the mesh is too large, the filtration effect is poor, making it inconvenient to use. This design proposes a closed system that allows for natural air intake and exhaust in large-scale ventilation systems. It opens when ventilation is needed and closes when protection is required, effectively preventing debris from entering the ventilation ducts. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a sealing mechanism for ventilation, which solves the problem that foreign objects can easily enter the existing ventilation ducts.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a ventilation-grade sealing mechanism, comprising a mounting bracket assembly, a door panel assembly, a filter screen, and a protective cover.

[0005] The mounting frame assembly is formed by a top beam, a left side beam, a bottom beam, and a right side beam that are fixedly connected end to end. A pneumatic control device is provided on the left side beam.

[0006] The door panel assembly includes several bearing seats respectively installed on the side walls of the left and right beams, a support shaft is rotatably mounted between the several bearing seats, and louvers are installed on the several support shafts;

[0007] The filter screen is installed on the left and right beams, the protective cover is installed on the outer wall of the right beam, and a transmission plate assembly is provided on several of the support shafts and located between the right beam and the protective cover.

[0008] Preferably, the pneumatic control device includes a mounting bracket installed on the left side beam, a cylinder body mounted on the mounting bracket, a cylinder end cover, a signal sensor, and a cylinder piston on the cylinder body, a manual gear shaft and a gear shaft respectively mounted on the input and output ends of the cylinder body, and a linkage mechanism connecting the gear shaft and the bearing seat on the left side beam.

[0009] Preferably, the transmission plate assembly includes transmission cranks respectively mounted on several support shafts, transmission connecting rods rotatably mounted on the several transmission cranks, and a first hinge is provided between the several transmission cranks and the transmission connecting rods.

[0010] Preferably, the linkage mechanism includes a driving crank mounted on a gear shaft, a connecting rod rotatably connected to the driving crank, a driven rocker arm rotatably connected to the connecting rod, the driven rocker arm being connected to a support shaft, and a second hinge being provided between the driving crank and the connecting rod.

[0011] Beneficial effects

[0012] This utility model provides a sealed mechanism for ventilation, which has the following beneficial effects:

[0013] 1. This design provides a sealing mechanism that not only meets the requirements of wind and rain protection in the natural atmospheric environment, but also satisfies the self-locking function of the mechanism when opening and closing. It occupies little space and volume, and does not occupy space outside the device when opening or closing.

[0014] When the door panel needs to be opened, compressed air is introduced into one end of the pneumatic control device. The cylinder piston is connected to the gear shaft by a rack and pinion. The compressed air pushes the chamber piston to drive the gear shaft 4-7 to rotate. The gear shaft is connected to the driving crank in the linkage mechanism by a key, and the door panel is connected to the driven rocker arm in the linkage mechanism by a key. The rotation of the gear shaft drives the driving crank to rotate, and the driving crank drives the driven rocker arm to rotate, thereby opening the door panel 2 and completing the opening of the mechanism.

[0015] When closing, when the door panel assembly needs to be closed, compressed air is introduced into the other end of the pneumatic control device. The cylinder piston and the gear shaft are connected by a gear and rack. The compressed air pushes the chamber piston to drive the gear shaft to rotate. The gear shaft is connected to the driving crank in the linkage mechanism by a key. The door panel assembly is connected to the driven rocker arm in the linkage mechanism by a key. The rotation of the gear shaft drives the driving crank 3-1 to rotate. The driving crank drives the driven rocker arm to rotate, thereby driving the door panel assembly to close and completing the mechanism closing. Attached Figure Description

[0016] Figure 1 This is an isometric view of the present invention.

[0017] Figure 2 This is a schematic diagram of the structural composition of this utility model.

[0018] Figure 3 This is a schematic diagram of the structural composition of the mounting bracket assembly of this utility model.

[0019] Figure 4 This is a schematic diagram of the structural composition of the door panel assembly of this utility model.

[0020] Figure 5 This is a schematic diagram of the structural composition of the linkage mechanism of this utility model.

[0021] Figure 6 This is a schematic diagram of the structure of the pneumatic control device of this utility model.

[0022] Figure 7 This is a schematic diagram of the structure of the filter screen of this utility model.

[0023] Figure 8 This is a schematic diagram of the structural composition of the transmission plate assembly of this utility model.

[0024] Figure 9 This is a schematic diagram of the structural composition of the protective cover of this utility model.

[0025] Figure 10 This is a side view of the door panel assembly of this utility model.

[0026] Figure 11 This is a schematic diagram of the installation of the pneumatic control device of this utility model.

[0027] Figure 12 This is a schematic diagram of the installation of the transmission plate assembly of this utility model.

[0028] Figure 13 This is a schematic diagram of the installation of the door panel assembly of this utility model.

[0029] Figure 14 This is a schematic diagram of the "off" position dead point locking of this utility model.

[0030] Figure 15 This is a schematic diagram of the dead point locking of the "open" position of this utility model.

[0031] In the diagram: 1. Mounting bracket assembly; 1-1. Top beam; 1-2. Left side beam; 1-3. Bottom beam; 1-4. Right side beam; 2. Door panel assembly; 2-1. Bearing seat; 2-2. Louver; 3. Linkage mechanism; 3-1. Driving crank; 3-2. Hinge assembly; 3-3. Connecting rod; 3-4. Driven rocker arm; 4. Pneumatic control device; 4-1. Cylinder end cover; 4-2. Cylinder body; 4-3. Signal sensor; 4-4. Manual gear shaft; 4-5. Mounting bracket; 4-6. Cylinder piston; 4-7. Gear shaft; 5. Filter screen; 6. Transmission plate assembly; 6-1. Transmission crank; 6-2. Transmission connecting rod; 6-3. Hinge; 7. Protective cover. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figure 1-15This utility model provides a technical solution: a sealed ventilation mechanism, including a mounting bracket assembly 1, a door panel assembly 2, a filter screen 5, and a protective cover 7.

[0034] The mounting frame assembly 1 is formed by the top beam 1-1, the left side beam 1-2, the bottom beam 1-3, and the right side beam 1-4 being fixedly connected end to end. A pneumatic control device 4 is provided on the left side beam 1-2.

[0035] The door panel assembly 2 includes a plurality of bearing seats 2-1 respectively installed on the side walls of the left beam 1-2 and the right beam 1-4, a support shaft is rotatably installed between the plurality of bearing seats 2-1, and louvers 2-2 are installed on each of the plurality of support shafts;

[0036] The filter screen 5 is installed on the left beam 1-2 and the right beam 1-4, the protective cover 7 is installed on the outer wall of the right beam 1-4, and a transmission plate group 6 is provided on several of the support shafts and located between the right beam 1-4 and the protective cover 7.

[0037] The door panel assembly 2 is designed with an S-shaped structure, which can effectively isolate wind and rain, and achieve wind and rain tightness of the sealing mechanism;

[0038] The connection between the mounting bracket assembly 1 and the door panel assembly 2 is achieved by bolting the bearing seat 2-1 to the mounting bracket assembly 1, which is fixed in place and rotatable.

[0039] The filter screen 5 and the mounting bracket assembly 1 are fixed by bolt connection;

[0040] The protective cover 7 and the mounting bracket assembly 1 are fixed by bolt connection.

[0041] Furthermore, the pneumatic control device 4 includes a mounting bracket 4-5 mounted on the left side beam 1-2. A cylinder body 4-2 is mounted on the mounting bracket 4-5. The cylinder body 4-2 is provided with a cylinder end cover 4-1, a signal sensor 4-3, and a cylinder piston 4-6. A manual gear shaft 4-4 and a gear shaft 4-7 are respectively mounted on the input end and the output end of the cylinder body 4-2. A linkage mechanism 3 is connected between the gear shaft 4-7 and the bearing seat 2-1 on the left side beam 1-2.

[0042] The pneumatic control device 4 is installed and fixed to the mounting bracket assembly 1 by bolts through the mounting bracket 4-5;

[0043] The cylinder transmission in the pneumatic control device 4 is a conventional technique and a common device in the mechanical field. This design uses its transmission control function, and this device uses existing mature technology. This is not the focus of this design, therefore, there is no need to describe the specific structure and usage of the cylinder body 4-2 in detail.

[0044] Furthermore, the transmission plate assembly 6 includes transmission cranks 6-1 respectively mounted on several support shafts, transmission connecting rods 6-2 rotatably mounted on several transmission cranks 6-1, and a first hinge 6-3 is provided between several transmission cranks 6-1 and transmission connecting rods 6-2.

[0045] The door panel is self-locking when opened and closed by using the "dead position" of the linkage mechanism.

[0046] Furthermore, the linkage mechanism 3 includes a driving crank 3-1 mounted on a gear shaft 4-7, a connecting rod 3-3 rotatably connected to the driving crank 3-1, a driven rocker arm 3-4 rotatably connected to the connecting rod 3-3, the driven rocker arm 3-4 being connected to a support shaft, and a second hinge 3-2 being provided between the driving crank 3-1 and the connecting rod 3-3.

[0047] In the linkage structure 3, the driven rocker arm 3-4 and the door panel assembly 2, and the driving crank 3-1 and the pneumatic control device 4 are all keyed to transmit torque and satisfy the self-locking function for opening and closing.

[0048] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0049] Example:

[0050] 1. Start the action

[0051] When door panel 2 needs to be opened, compressed air is introduced into one end of the pneumatic control device 4. The cylinder piston 4-6 is connected to the gear shaft 4-7 by a rack and pinion mechanism. The compressed air pushes the piston 4-6, causing the gear shaft 4-7 to rotate. The gear shaft 4-7 is keyed to the driving crank 3-1 in the linkage mechanism 3, and the door panel 2 is keyed to the driven rocker arm 3-4 in the linkage mechanism 3. The rotation of the gear shaft 4-7 drives the driving crank 3-1 to rotate, which in turn drives the driven rocker arm 3-4 to rotate, thereby opening the door panel 2 until it reaches the "open dead center" position. This completes the opening and self-locking of the mechanism.

[0052] 2. Closing action

[0053] When door panel 2 needs to be closed, compressed air is introduced into the other end of the pneumatic control device 4. The cylinder piston 4-6 is connected to the gear shaft 4-7 by a rack and pinion mechanism. The compressed air pushes the piston 4-6 to rotate the gear shaft 4-7. The gear shaft 4-7 is keyed to the driving crank 3-1 in the linkage mechanism 3, and the door panel 2 is keyed to the driven rocker arm 3-4 in the linkage mechanism 3. The rotation of the gear shaft 4-7 drives the driving crank 3-1 to rotate, which in turn drives the driven rocker arm 3-4 to rotate, thereby closing the door panel 2 until it reaches the "closed dead point" position. This completes the closing and self-locking of the mechanism.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Airtight mechanism for ventilation, characterized in that, Includes mounting bracket assembly (1), door panel assembly (2), filter screen (5), and protective cover (7): The mounting frame assembly (1) is formed by the top beam (1-1), the left side beam (1-2), the bottom beam (1-3), and the right side beam (1-4) being fixedly connected end to end. A pneumatic control device (4) is provided on the left side beam (1-2). The door panel assembly (2) includes a plurality of bearing seats (2-1) respectively installed on the side walls of the left beam (1-2) and the right beam (1-4), a support shaft is rotatably installed between the plurality of bearing seats (2-1), and louvers (2-2) are installed on each of the plurality of support shafts; The filter screen (5) is installed on the left beam (1-2) and the right beam (1-4), the protective cover (7) is installed on the outer wall of the right beam (1-4), and a transmission plate assembly (6) is provided on a plurality of the support shafts and located between the right beam (1-4) and the protective cover (7).

2. The sealing mechanism for ventilation according to claim 1, wherein The pneumatic control device (4) includes a mounting bracket (4-5) mounted on the left side beam (1-2). A cylinder body (4-2) is mounted on the mounting bracket (4-5). The cylinder body (4-2) is provided with a cylinder end cover (4-1), a signal sensor (4-3), and a cylinder piston (4-6). A manual gear shaft (4-4) and a gear shaft (4-7) are respectively mounted on the input and output ends of the cylinder body (4-2). A linkage mechanism (3) is connected between the gear shaft (4-7) and the bearing seat (2-1) on the left side beam (1-2).

3. The sealing mechanism for ventilation according to claim 1, wherein The transmission plate assembly (6) includes transmission cranks (6-1) respectively mounted on several support shafts, transmission connecting rods (6-2) rotatably mounted on several transmission cranks (6-1), and a first hinge (6-3) is provided between several transmission cranks (6-1) and transmission connecting rods (6-2).

4. The sealing mechanism for ventilation according to claim 2, wherein The linkage mechanism (3) includes a driving crank (3-1) mounted on a gear shaft (4-7), a connecting rod (3-3) rotatably connected to the driving crank (3-1), a driven rocker arm (3-4) rotatably connected to the connecting rod (3-3), the driven rocker arm (3-4) being connected to a support shaft, and a second hinge (3-2) being provided between the driving crank (3-1) and the connecting rod (3-3).

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